
import { ref,onMounted ,onUnmounted,watch} from 'vue'
// 引入 echarts 核心模块，核心模块提供了 echarts 使用必须要的接口。
import * as echarts from 'echarts/core';
// 引入柱状图图表，图表后缀都为 Chart
import { BarChart,LineChart ,RadarChart,PieChart   } from 'echarts/charts';
// 引入标题，提示框，直角坐标系，数据集，内置数据转换器组件，组件后缀都为 Component
import {
  TitleComponent,
  TooltipComponent,
  GridComponent,
  DatasetComponent,
  TransformComponent,
  LegendComponent ,
  ToolboxComponent 
} from 'echarts/components';
// 标签自动布局、全局过渡动画等特性
import { LabelLayout, UniversalTransition } from 'echarts/features';
// 引入 Canvas 渲染器，注意引入 CanvasRenderer 或者 SVGRenderer 是必须的一步
import { CanvasRenderer } from 'echarts/renderers';

// 注册必须的组件
echarts.use([
  TitleComponent,
  TooltipComponent,
  GridComponent,
  DatasetComponent,
  TransformComponent,
  BarChart,
  LabelLayout,
  UniversalTransition,
  CanvasRenderer,
  LineChart ,
  RadarChart,
  PieChart,
  LegendComponent,
  ToolboxComponent
]);
 export function useEcharts(options:any){
    const chartRef = ref(null)
    let chart:any = null

    const initChart = () => {
        if(chartRef.value){
            chart = echarts.init(chartRef.value)
            chart.setOption(options.value)
        }
    }

    watch(() => options.value, (newValue:any) => {
        if(chart){
            chart.setOption(newValue)
        }
    },{deep:true})

    const resetChart = () => {
        if(chart){
            chart.resize()
        }
    }

    onMounted(()=> { 
        initChart()
        window.addEventListener('resize',resetChart)
    })


    onUnmounted(()=> {
        if(chart){
            chart.dispose()
            chart = null
        } 
        window.removeEventListener('resize',resetChart)
    })

    return {
        chartRef,
        chartInstance:chart
    }
}